We all have or should have inherited guilt. As opposed to personal guilt.
Drawn by the knowledge that what we now have as a society is built on a wealth made from subjugating most of the world and enslaving people based purely on the colour of their skin.
Not saying people from other places shouldn't similarly have inherited guilt, but due to the scale of both the crimes committed by our nation in the past, and the wealth and power those crimes brought, ours should weigh heavier than pretty much any nation on earth.
It is a collective guilt and not one you should beat yourself up about too much, but it should definitely make you feel that little less proud/Happy to be British.